How to get from hotel in osaka to kansai airport very early in the morning!

konnichiwa!

hey guys, im gonna be going on a family trip to JPN and am going to osaka and tokyo. departing back to my home country from osaka, flight is at morning 10AM. and we'd like to reach 5 hours earlier ATLEAST – cant question it, my parents have said it already. wanted some help to figure out best way to travel to the airport at morning 5AM or earlier.
i am staying near : 3 Chome-5-4 Nishikujo, Konohana Ward, Osaka, 554-0012, Japan

i know taxis exist, but they are predominantly expensive. also, we have three suitcases – medium sized and one bagpack each.

help will be appreciated, arigato kozaimasuuu!